In comparison to the US, India’s PM2.5 air quality standards are more than 3x worse. China’s levels range from 40 – 150 micrograms per cubic meter, with residential being 40, commercial being 100, and industrial being 150. China’s industrial levels are 12½ × worse than the US!

US 12; India 40; China (res.) 40; China (com.) 100; China (ind.) 150

All levels are in µgms per m³